Do Our Genes Cause Obesity?

You may have heard in the media about the latestSounds bad, but what can we do about it, after the
study about childhood obesity. In the press it waslatest news?
reported that childhood obesity is caused 77% byFortunately, the media story is not the whole story. If
genetic makeup and only 23% by lifestyle andyou read the paper it's based on, it's not as dire as you
environmental factors. Newspapers love these Naturemight think. The Introduction starts by pointing out that
vs. Nurture arguments as they can fill their pages withgenetically humans have not changed in the last 15
endless pontificating and claim it's based on fact.years, during which the 'dramatic rise in childhood
Is this latest story good news? After all, if kids areobesity' has taken place. So the increase is obesity is
getting fatter because of their genes, the same mustclearly due to the change in lifestyle and environment
be true for us too. Therefore, our increasing obesity isexperienced by children today compared with their
beyond our control and we can wallow in our comfypredecessors. The study just highlights the fact that
armchairs and eat snacks with alacrity. Great, huh?some people are more genetically predisposed to gain
On the other hand, you may think that it's bad news. Ifweight than others. So it's harder for some people to
our weight is beyond our control, then we just have tokeep their weight down than others.
accept that we'll keep on getting fatter and fatter. AsHowever, the root cause of being overweight is the
a result, not only will we need to go out and keep onsame as it's always been. Consuming too much
buying bigger and bigger armchairs, but also we'll beenergy from our food and doing too little exercise to
condemned to a lifetime of ill health. Obesity mayuse it up. The Discussion part of the study points out
seem harmless enough, but when you investigate itsthat reducing the prevalence of obesity 'will require at
health implications you realize just how bad it is. Tryleast as much emphasis on creating healthier external
these examples for size:environments and teaching vulnerable persons to
adopt life-long prudent habits as on encouraging
1. Young people that have a Body Mass Index (BMI) ofparents to modify home settings.' Put another way, we
35 or more have double the risk of death compared(you, me and the Government) must all create
with people the same age that have a normal BMI.healthier environments by increasing the amount of
2. Obese people are much more likely than 'normal'exercise we take, and reducing our intake of poor
weight people to suffer from high blood pressure anddiets.
other cardiovascular problems, increasing the likelihoodThat may sound like bad news. But try looking at it this
of dying prematurely due to Myocardial Infarctionway. All it actually means is that we can affect our
(heart attack) enormously - 1.5 times the normal riskweight, and as a result affect our health and even our
for men and 3.2 times the normal risk for women.longevity. We can take control simply by eating more
3. Being obese has been shown to greatly increasehealthily and doing more exercise. Sure, some people
the risk of contracting many forms of cancer, includingwill find it easier than others. So what? Life's like that.
cancer of the colon - 3.0 times the risk for men andSome people have it easy, some have it harder. The
2.7 times the risk for women, compared withfact is everyone CAN do something about it.
non-obese people.Everyone has the capability to transform their life,
4. Obesity greatly increases the risk of contractingreduce their risk of premature death, and live more
Type 2 Diabetes - by 5.2 times for men and ahealthily. Contrary to news reports, this study just
massive 12.7 times for women.confirms it. And that's the best news you can get -
These all came from Statistics on Obesity, Physicalyou may be prone to gaining weight and suffering the
Activity and Diet: England, January 2008, published byhealth consequences, but you can do something about
the NHSit. That's what I call empowerment.